Lord of the Truth - Chapter 443 Gains?

I became the Heavenly Demon’s dog.

In the Sky Sword Continent there are thousands of sects and strong cultivators as common as trees. In order to prevent his older sister from being forcefully married off, Lu Xuan had no choice to but to unceasingly cultivate and enter a sect to ask for a favor. By chance, a sword-shaped crystal of mysterious origins entered into Lu Xuan’s body, containing countless top-class martial skills, powerful martial arts, and everything you could wish for! A martial legend starts here…

- Description from Novelupdates

A girl who calls herself a demon appeared before a timid student named Fumio Kijima. The girl claims to be a campaign girl from the demon world and she gives him the ability to “summon a room” from nothing but thin air.

At first he doesn’t abuse his power and uses it as a convenient ability in his every day life. But one day he is bullied by his classmates under a false pretext and is made to suffer. In the past he would have wallowed in misery and cried himself to sleep, but now he had a power to call upon.

“I will make them regret it!”

Using his powers to summon his “room”, he begins his era of confinement and brainwashing to achieve his goals.

The Old Gods are gone. Lost and Forgotten, their honor shattered and their kingdoms broken by treachery.The Peace of the Myriad Heavens has been severed. And from the ashes of war and chaos, the Twin Towers of Babel have been created as a beacon of hope.Can Altair, a child born of the Old Gods whose name has long since been forgotten, survive, or will he be cast into the Nine Hells?***“So...” Arsene continued, enjoying his child's flush expression. “I've got a few things to teach you. What I'm about to give you is some peak wisdom. Think of it as my Ten Commandments: One, never trust a bitch with red hair. Trust me on this. Two, the pull-out game is not a real thing. She will get pregnant. Three—”“F-Father…”“ —Never get yourself more than one wife. It sounds fun. It is fun. But it's truly a nightmare. You better be writing this stuff down. This is some grade-A wisdom right here. Four.“...Please stop talking…” The Prince pleaded.“Shhhhh. Just let this happen. Four…Bro's before hoes isn't a thing. The hoes come first. Remember, Booty is more important than Wa— ”“STOP!!!!!”